A coastal Dutch fortress has been converted into a spiraling new pavilion and cafe by <a href="http://www.emma-architecten.nl/" target="_blank">Emma Architecten</a>. Situated on a <a href="http://whc.unesco.org/" target="_blank">UNESCO world heritage</a> site in Amsterdam, the fortress was originally constructed to defend Holland's capital city. The newly renovated Paviljoen Puur (Puur Pavilion) was inspired by the curving slope of the surrounding landscape, and it's built on the site of a former soldier shelter, where the existing bunkers have been preserved.

The 19th century Fortress Diemerdam was part of the <a href="http://www.stelling-amsterdam.nl/english/" target="_blank">Stelling of Amsterdam</a>, a line of structures originally built to defend the city.

The renovation and restoration by the Dutch architecture studio was part of a larger project, and it was recently included on the <a href="http://whc.unesco.org/" target="_blank">UNESCO world heritage</a> list.

A coastal Dutch fortress has been converted into a spiraling new pavilion and cafe by Emma Architecten. Situated on a UNESCO world heritage site in Amsterdam, the fortress was originally constructed to defend Holland's capital city. The newly renovated Paviljoen Puur (Puur Pavilion) was inspired by the curving slope of the surrounding landscape, and it's built on the site of a former soldier shelter, where the existing bunkers have been preserved.